Bill Ackman, Ronald Lauder, William Lauder, Barry Diller and Dan Loeb have all made large donations to stop Mamdani. So have several non-New Yorkers.

A week before the vote, the self-proclaimed socialist leads the polls after a savvy campaign on the cost of living. But his stance to the left of the party unsettles even his own…

Mamdani's success in New York resonates across country and globe, but final days of race could make or break movement.